US3737491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts
Assignee: AECI Ltd
•
Filing: 1970-12-09
•
Granted: 1973-06-05
•
Expires: 1990-12-09
Abstract
Abstract CATALYST SUPPORTS COMPRISING POROUS, SHAPED REFRACTORY BODIES ARE MADE BY HEATING A MIXTURE OF CONSTITUENTS OF WHICH AT LEAST ONE IS SELECTED FROM THE NITRATE, OXIDE OR HYDROXIDE OF ALUMINUM AND THE DIOXIDE OF ITANIUM AND AT LEAST ONE IS SELECTED FROM THE NITRATES OF ALKALINE EARTH METALS TO FIRST ELEVATED TEMPERATURE SUFFICIENT TO PRODUCE A BINDING AGENT WITHIN THE MIXTURE, COMMINUTING THE RESULTING MATERIAL, SHAPING THE MATERIAL INTO BODIES AND HEATING THE SHAPED BODIES AT A SECOND ELEVATED TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO COMPLETE THE EACTIONS BETWEEN THE CONSTITUENTS TO PRODUCE BODIES OF ADEQUATE MECHANICAL STRENGTH TO BE SELF SUPPORTING.
Inventors
- 👤 C Stander
- 👤 D Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:53
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |